Properties of 1-1 electrolytes solutions in ethylene glycol at temperatures from 5 to 175 °C Part 2 Limiting ion conductances and ion–molecule interactions

Abstract

From previous experimental data (A. V. Lebed, O. N. Kalugin and I. N. Vyunnik, J. Chem. Soc., FaradayTrans., 1998, 94, 2097.), the limiting conductances of Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺, Me₄N⁺, Et₄N⁺, Bu₄N⁺, F⁻, Cl⁻, Br⁻ and BPh₄⁻ ions and the structure-dynamical parameters of ion–molecule interaction were evaluated in the framework of the model proposed by the authors. The thicknesses of the ion solvation shell (Gurney co-sphere) have also been obtained. It was shown that single-charged ions with the smallest radii (Li⁺, Na⁺, F⁻), moderate radii (K⁺, Rb⁺, Cs⁺, Cl⁻, Br⁻) and large complex ions (Me₄N⁺, Et₄N⁺, Bu₄N⁺, BPh₄⁻), have different mechanisms of influence on the solvent structure and dynamics. It is concluded that the temperature dependence of near-solvation parameters is caused by a significant change in the solvent hydrogen-bond net.